Preserve stashes of the latest build

This is to help me inspect them to figure out why I can’t unstash them in the
other job.

1 files changed, 4 insertions, 0 deletions

diff --git a/Jenkinsfile b/Jenkinsfile
index 4d31891..86307c2 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -1,6 +1,10 @@
 pipeline {
     agent none
 
+    options {
+        preserveStashes()
+    }
+
     stages {
         stage('Build') {
             parallel {